/*
 * Copyright:  2018 smarabbit studio.
 *
 *  Licensed under the Confluent Community License; you may not use this file
 *  except in compliance with the License.  You may obtain a copy of the License at
 *
 *  http://www.confluent.io/confluent-community-license
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OF ANY KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations under the License.
 *
 *  @作   者： 黄开晖 (117227773@qq.com)
 *  @日   期:  2021年10月27日
 */
package com.massyframework.beanskin.runtime.framework.protocol;

import java.net.URLStreamHandler;
import java.net.URLStreamHandlerFactory;

/**
 * URLStreamHandlerFactory封装器，支持覆盖系统的URLStreamHandlerFactoryWrapper.
 * <p>
 * 实用于jdk8及以下版本。
 * @author huangkh
 *
 */
public class URLStreamHandlerFactoryWrapper implements URLStreamHandlerFactory {
	
	private URLStreamHandlerFactory factory;

	/**
	 * 
	 */
	public URLStreamHandlerFactoryWrapper(URLStreamHandlerFactory factory) {
		this.factory = factory;
	}

	@Override
	public final URLStreamHandler createURLStreamHandler(String protocol) {
		URLStreamHandler result = this.tryCreateURLStreamHandler(protocol);
		if (result == null) {
			return factory == null ? null : factory.createURLStreamHandler(protocol);
		}
		return result;
	}
	
	/**
	 * 尝试根据{@code protocol}创建对应的URLStraemHandler
	 * @param protocol {@link String},协议
	 * @return {@link URLStreamHandler},可能返回null.
	 */
	protected URLStreamHandler tryCreateURLStreamHandler(String protocol) {
		return null;
	}

}
